com.sas.framework.expojo.jdo
Class JdoPersistenceProvider

java.lang.Object
  com.sas.framework.expojo.PersistenceProvider
      com.sas.framework.expojo.jdo.JdoPersistenceProvider

public class JdoPersistenceProvider
extends PersistenceProvider

Provides facilities for accessing transparent persistence via a JDO compliant persistence engine.

Field Summary

protected PersistenceManager	pm Stores a reference to the persistence manager.
protected PersistenceManagerFactory	pmf JDO persistence manager factory object.

Fields inherited from class com.sas.framework.expojo.PersistenceProvider

depth, modelExposer

Constructor Summary

JdoPersistenceProvider(PersistenceManagerFactory iPmf)
Constructs the object.

Method Summary

void	beginTx() Begins a transaction.
void	close() Closes the persistence provider.
void	commitTx() Commits a transaction.
void	delete(java.lang.Object object) Deletes the persistent object from the datastore.
PersistenceManager	getPm() Returns pm
boolean	hasActiveTx() Returns true if the PersistenceProvider has an active transaction.
void	open() Opens a persistence provider.
void	persist(java.lang.Object object) Makes the given object persistent.
java.lang.RuntimeException	processException(java.lang.RuntimeException e) Processes an exception thrown while in a transaction.
void	rollbackTx() Rolls back a transaction.
void	setPm(PersistenceManager pm) Sets pm

Methods inherited from class com.sas.framework.expojo.PersistenceProvider

setModelExposer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

pm

protected transient PersistenceManager pm

Stores a reference to the persistence manager.

pmf

protected transient PersistenceManagerFactory pmf

JDO persistence manager factory object. Uses this in 'open' to create a persistence manager.

Constructor Detail

JdoPersistenceProvider

public JdoPersistenceProvider(PersistenceManagerFactory iPmf)

Constructs the object.

Method Detail

hasActiveTx

public boolean hasActiveTx()

Returns true if the PersistenceProvider has an active transaction.

Specified by:

hasActiveTx in class PersistenceProvider

open

public void open()

Opens a persistence provider.

Specified by:

open in class PersistenceProvider

processException

public java.lang.RuntimeException processException(java.lang.RuntimeException e)

Processes an exception thrown while in a transaction. The exception could be relevent to the persistence technology or a generic RuntimeException. If it's an optimistic verification exception (optimistic locking check failed) then no exception is thrown and the persistence technology may or may not need clean. In the case of JDO a rollback as already been performed.

Specified by:

processException in class PersistenceProvider

close

public void close()

Closes the persistence provider. It can no longer be used after being closed.

Specified by:

close in class PersistenceProvider

delete

public void delete(java.lang.Object object)

Deletes the persistent object from the datastore.

Specified by:

delete in class PersistenceProvider

persist

public void persist(java.lang.Object object)

Makes the given object persistent.

Specified by:

persist in class PersistenceProvider

setPm

public void setPm(PersistenceManager pm)

Sets pm

getPm

public PersistenceManager getPm()

Returns pm

rollbackTx

public void rollbackTx()

Rolls back a transaction.

Specified by:

rollbackTx in class PersistenceProvider

commitTx

public void commitTx()

Commits a transaction.

Specified by:

commitTx in class PersistenceProvider

beginTx

public void beginTx()

Begins a transaction.

Specified by:

beginTx in class PersistenceProvider